A website's Accessibility Score is a 0 - 100 score ranking your level of accessibility compliance, with 100 being the best.
We calculate your score using an algorithm that weighs the impact of your website's current accessibility issues. For example, if an error on your website has little end-user impact, it will not weigh as heavily in your overall score as compared to a WCAG error with significant end-user impact. This is also why a website with a handful of impactful errors may have a lower score than a website with more errors that are less impactful to the end user.
If you have a low Accessibility Score, that's an indication that there's a significant impact to the end user, and these errors should be addressed.
It's important to note, your Website Accessibility Score is not the number of errors still found on your site or an indication of compliance.